Drilling-machine



(No Model.) 2 Sheets-Sheet 1.

J.T.SNYDER. DRILLING MACHINE,

No. 539,491. Patents d May 21 18,95.

UNITE STATES ATENT FFlCE.

JOHN T. SNYDER, OF LUZERNE, PENNSYLVANIA.

DRILLING-NIACHINE.

SPECIFICATION forming part of Letters Patent No. 539,491, dated May 21,1895.

Application filed June 15,1894,- Serial No. 514,681. (No model.)

To @135 whom it may concern:

Be it known that I, JOHN T. SNYDER, acitizen of the United States,residing at Luzerne, in the county of Luzerne and State of Pennsylvania, have invented a new and useful Drilling-Machine, of which thefollowing'is a specification.

The invention relates to improvements in drilling machines.

The object of the present invention is to simplify and improve theconstruction of coal drilling machines, to dispense with the ordi narythreaded feed. bar usually required, and to enable the auger to serveand operate as a feed bar.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a perspective view of a mining-machineconstructed in accordance with this invention. Fig. 2 is a verticallongitudinal sectional view, the auger being shown in elevation. Fig. 3is a transverse sectional view. Figs. 4 and 5' are detail perspectiveviews of the gear-wheels for rotating and feeding the auger. Fig. 6 is adetail perspective view of the stub-shaft.

Like numerals of reference indicate corresponding parts in all thefigures of the drawings.

1 designates a cylindrical casing provided with opposite trunnions,which are j ournaled in suitable bearings of a yoke 3. The cylindricalcasing is provided at its front and rear with circular openings,receiving the hubs 4 and 5 of gear wheels 6 and 7, operatingrespectively on an anger 8 for rotating and feeding the same. The casingis provided with a removable front plate 9, which is detachably securedby screws, or similar fastening device, passing through registeringopenings or perforated-lugs of the body of the casing and the frontplate thereof.

The hub of the gear wheel 6, which rotates the anger, is provided atdiametrically opposite points on its interiorwith longitudinal ribs orsplines 10, engaging longitudinal grooves 11 of the anger, the groovesbeing formed by rectangular transverse peripheral notches or recessesformed in each twist of the twisted blade of the auger. The hub 4 is ofsufficient length to enable theribs or splines thereof to engage asufficient number of the recesses or notches of the auger to obtain therequisite strength,'and to prevent any liability of injuring the augerby straining a portion of it.

The hub 5 is provided at opposite sides of its interior with lugs 12,having bearing recesses 13 which are located eccent'rically withrelation to the auger, and in which continuously are journaledanti-friction rollers 14, which engage the opposite faces of the twistedblade of the auger, whereby the latter is fed forward. The anti-frictionrollers 14. are parallel with each other, and with the line of thelongitudinal movement of the auger, and by locating the anti-frictionrollers at the outer end of the hub of the gear-wheel, they are readilyaccessible. The outer end of the same is provided with a suitable bitsocket 15; and ball bearings 16 are provided between the outer faces ofthe cogs 6 and 7 and the sides, or the front and back of the casing toenable the rotation of the cog wheels to be frictionthe auger to a givendistance of feed may bereadily regulated. The cog wheels are connectedby gear wheels 17 and 18 with a drive shaft 19 journaled in suitablebearings 20 and 21 of a casing, and provided with square or polygonalends located at opposite sides of the machine, wherebya crank handlemaybe arranged at either or both sides of the'drilling machine.

The gear wheel 17 is elongated and meshes with both'of the cog wheels 6and 7, the easing being provided with an opening for this purpose, andthe said gear wheel 17 is provided at its rear end with bevel cogs,which mesh with the bevel gear wheel 18 fined to the drive shaft. Thegear wheel 17 is loosely mounted on a stub shaft 22, provided at itsrear end with a sleeve, arranged on the drive shaft and located betweenthe bevel gear wheel and the outer bearing of the drive shaft; and thefront end of the stub shaft is detachably secured in an open hearing bya removable pin 23, which is adapted to be withdrawn from perforationsof the bearing 24 to permit the stub shaft to be swung rearward to throwthe elongated cog wheel out of gear, in order that the auger may bereadily adjusted and returned to its initial position.

It will be seen that the drilling machine is simple and comparativelyinexpensive in construction, and that the rotation and feeding of theauger may be readily maintained and controlled without employing anadditional feed shaft.

Changes in the form, proportion, and the minor details of constructionmaybe resorted to without departing from the principle or sacrificingany of the advantages of this in- Vention.

\Vhat I claim is 1. In a drilling machine, the combination of a frame,an anger having a twisted blade, a gearwheel connected by a spline withthe auger, and adapted to rotate the same, afeed gear wheel provided onthe interior of its hub at the outer end of the same, at diametricallyopposite points, with lugs having bearing recesses, the paralleleccentrically arranged anti-friction rollers mounted in the bearingrecesses and arranged parallel with the line of longitudinal movement ofthe anger and engaging the opposlte faces thereof at opposite sides ofthe longitudinal axis, and gearing for rotating the gear-wheels,substantially as described.

2. In a drilling machine, the combination of a frame, an anger providedat its twisted blade with notches forming grooves or ways, a gear wheelmounted on the frame and provided on the interior of its hub with ribsor splines engaging the grooves or ways, a feed gear wheel journaled inthe frame and provided on its interior with anti-friction wheelsengaging the faces of the twisted blade of the auger, and mechanism forrotating the gear wheels, substantially as described.

3. In a drilling machine, the combination of a frame or casing ofcylindrical shape provided with opposite openings, a gear wheel mountedin the casing and having a hub extended through one of the openings ofthe casing and provided with ribs or splines, a feed gear wheel arrangedin the frame or casing and having its hub extending through the otherhub thereof and provided with antifrlction wheels, an anger extendingthrough the hubs of said gear wheels and haying its faces engaged by theanti-friction wheels and provided with notches to receive the ribs orsplines, a transverse drive shaft journaled in suitable bearings of theframe or casing and carrying a beveled gear wheel, a stub shaft hingedlyconnected with the drive shaft and arranged at right angles to the sameand extending forward therefrom and having its front end detachablysecured to the frame or casing, and a gear wheel mounted on the stubshaft and meshing with the beveled gear wheel of the drive shaft and thegear wheels of the frame or casing, substantially as described.

4. In a drilling machine, the combination of a casing having front andrear walls provided with circular openings, an anger, the gear wheel 6arranged within the casing and having an extended hub arranged in one ofthe circular openings of the casing and interlocked with the anger, thefeed gear wheel arranged within the casing and having itsinner facebearing flat against the inner face of the gear wheel 6, said feed gearwheel having an extended hub arranged in the other circular opening ofthe casing and engaging the auger, and a gear wheel mounted on thecasing and meshing with both of the said gear wheels and rotating them,substantially as described.

5. In a drilling machine, the combination of a casing having front andrear walls provided with circular openings and having at their innerfaces adjacent to the circular openings annular recesses, an anger, thegear wheels 6 and 7 arranged face to face in the casing and havingoppositely extended hubs arranged in the circular openings of the casingand engaging the anger, the anti-friction balls located in the annularrecesses of the casing and engaging the outer faces of the gear wheelsand the exterior of their hubs, and gearing for rotating said gearwheels at different speeds, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

JOHN T. SNYDER.

Witnesses:

SAMUEL SNYDER, (J. W. HONEYWELL.

